ppl. a. (UN-1 8.)

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1770.  Glover, Leonidas (ed. 5), VI. 418. They well may keep the field, Who with unslaken’d [1772 unslacken’d] nerves endur’d that day.

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1844.  Mrs. Browning, Sonn., Patience, 7. Ocean girds Unslackened the dry land.

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1870.  Daily News, 23 April. He drove down a narrow road … followed by the waggon and horses with unslackened speed.

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1890.  ‘R. Boldrewood,’ Miner’s Right, xlii. Still the quartz-crushing machine … went thundering on … unchecked, unslackened.

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